Finding the Fourth Proportional to 1,111.05, 1,664.33 and 525.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.05 : 1,664.33 = 525.24 : x
2. Step 2: Convert to fraction form
   1,111.05/1,664.33 = 525.24/x
3. Step 3: Cross multiply
   1,111.05x = 1,664.33 × 525.24
4. Step 4: Simplify right side
   1,111.05x = 874,170.06
5. Step 5: Solve for x
   x = 874,170.06/1,111.05
6. Step 6: Final answer
   x = 786.80